Question

Дана арефметическая прогрессия 19; 15; .... найдите пятый член данной прогрессии​

Answer 1

19;15;11;7;3

A(n+1)=A(n)+D

Answer 2

Arithmetic Progression

To find the fifth term of the arithmetic progression 19, 15, ..., we can use the formula for the nth term of an arithmetic progression:

nth term (Tn) = a + (n - 1)d

Where: - a = the first term - n = the term number - d = the common difference

In this case, the first term (a) is 19, and the common difference (d) can be found by subtracting the second term from the first term: 15 - 19 = -4.

Now we can use the formula to find the fifth term: T5 = 19 + (5 - 1)(-4)

Calculating this, we get: T5 = 19 + 4(-4) = 19 - 16 = 3

So, the fifth term of the given arithmetic progression is 3.